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Merge pull request #3 from HansMuller/add-bounded-friction-simulation

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Added BoundedFrictionSimulation
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Hans Muller 2015-07-27 09:11:25 -07:00
commit 7c8bf7e05e
1 changed files with 22 additions and 0 deletions
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22
packages/newton/lib/src/friction_simulation.dart
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@ -24,3 +24,25 @@ class FrictionSimulation extends Simulation {
@override
bool isDone(double time) => dx(time).abs() < this.tolerance.velocity;
}
class BoundedFrictionSimulation extends FrictionSimulation {
BoundedFrictionSimulation(
double drag,
double position,
double velocity,
double this._minX,
double this._maxX) : super(drag, position, velocity);
final double _minX;
final double _maxX;
double x(double time) {
return super.x(time).clamp(_minX, _maxX);
}
bool isDone(double time) {
return super.isDone(time) ||
(x(time) - _minX).abs() < tolerance.distance ||
(x(time) - _maxX).abs() < tolerance.distance;
}
}